Quote verification

This proves the quote below is recorded by Citatio exactly as displayed and has not been altered since it was committed and anchored. It documents Citatio's crawl observation; it does not imply endorsement by the source platform. The quote links to the original review.

“something a student in high school can't typically afford”
Google Play · 4/5 · 2026-10-06

Checks (re-run on this request)

✓ Signature — Ed25519 signature over the record hash, verified against the public key at /.well-known/citatio-signing.json
✓ Merkle inclusion — Leaf recomputed through the sibling path to the anchored root
✓ Public transparency log — Sigstore Rekor log index 3198225546

Proof data

Record hash (SHA-256): 3b92edc07bff88bca8f9ebdae184f9556aee2aaa1689618a93d409b14a5f7ad4
Signature (Ed25519, base64): H6bzRM0j/gC1vnXWbA1+c5Dz9OOzqHL+K6lGLlG1CpHC8EOPPoVoPDqoyno9uzuvwTkWA90MjXnZ5pOfGoiJDg==
Merkle root: 12764493a64961d0e0d426bbec64b837c2e35bc22a58920afcc56db07df6e8c9
Merkle path: ["3b91fca0d029d396ec038da44dd6b9d110dcb79d447b8c9433203e0344c2000d","85063e4327bc57dcc793a60dffe2cec2e52346b2009143b2a51fbdb1a65c169c","b2664ddca31987a2a2f58b1dd65db35c12d96690c63c78f82c3e84a6155645f7","ca37866947fb9721a69394525e4b3fc6604d11aa506002fad083af001b510684","dbfa9f2baa45f594ffcaa28383be907bda58da9f03523a230386a16b679f3e37","bbe295893227fe41ebad42eb3db7a916d7997cefadd924b365003f3f024c7c7c","94ae1d7c787ce93d3fa6ebb717fefe9117f86f1ab0ba9afe323770cd79030a49","36bf8672c1522236fe8628e9c8977d51cf35128d3de2b0266e3a4a359c4bdad7","81c45d71058f93fd320fe069293127d4597b2f8544075d0062e4ef0d424440c0","845d2b9aca9b9ab74d092f1396d90769947590487521ec7fbce144ebdb46fe5d","850f40bca8479fb76723330a998b26e893fdb60793e9f279781b0ed6032b5058","b52a8a3015ae5229f5a7205f9433251f53bb2b22b2f3bb0bfbb3deb2076f2c89","b6c6b7aa75be4fd4f206793d7c98702963f427cfe45d9c46972416cafee9a131","bf01790763bd70681430a2841b8504c59b88918b5b88c9d70f6ee7041d7ca6c8"]
Anchored: 2026-10-11
Public log entry: search.sigstore.dev, log index 3198225546 · entry 108e9186e8c5677a10cb…
Expected log hash: a11b46fc63b94f32c49058752856fbdc4e92f7a41d4e67238e3563657fcd50e4 The log entry's spec.data.hash.value must equal this value: the SHA-256 of the Merkle root string above. Recompute it yourself from the root to confirm.
Canonical record: {"dataset_version":"v1791685609571","kind":"published-quote","locale":"en","page":"brand:vaia","quote":"something a student in high school can't typically afford","rating":4,"review_date":"2026-10-06","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (12764493a649…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
Locally, without any Citatio infrastructure: SHA-256 the canonical record (must equal the record hash), verify the Ed25519 signature against the public key, and fold the hash through the Merkle path (sorted-pair SHA-256) to reach the anchored root.